I'm thinking of getting an SLR because I want some wide-angle lenses: 28mm and 35mm. I prefer rangefinders, but I'm thinking of trying an SLR because there are no rangefinders that I'm 100% happy with outside of Leica M series which is way too much for me.

This is probably a silly question, so excuse me if it is so basic, but is barrel distortion a huge deal with these lenses? I'm undecided in which brand to go with but Nikon seems like a safe bet so I was just thinking Nikon with a 35mm/f2 and 28mm/f2.8 lens or Possibly an Olympus OM with an equivalent set of lenses. I'm don't care about any auto features.